Single and mixed interaction of experimental Trypanosoma brucei brucei and Trypanosoma evansi on the semen collection reaction time and spermatozoa morphology of Yankasa rams

  • Yunusa A. Wada Department of Zoology, Faculty of Life Sciences, Ahmadu Bello University, Zaria
  • Sonnie J. Oniye Department of Zoology, Faculty of Life Sciences, Ahmadu Bello University, Zaria
  • Peter I. Rekwot National Animal Production Research Institute, Ahmadu Bello University, P.M.B. 1096 Shika-Zaria
  • Oluyinka O. Okubanjo Department of Veterinary Parasitology and Entomology, Faculty of Veterinary Medicine, Ahmadu Bello University, Zaria
Keywords: Morphology, Reaction time, Semen, Sperm, Yankasa ram

Abstract

Objective: This study was conducted to evaluate the pathological effects of experimental trypanosomosis on the semen collection reaction time and spermatozoa morphology of Yankasa rams.

Materials and Methods: Twelve apparently healthy Yankasa rams aging 24-30 months and weighing 22-25 Kg were randomly selected and were distributed into four (4) groups. Groups I and II were challenged with experimental Trypanosoma brucei brucei (Federe strain) and T. evansi (Sokoto strain) respectively, while group III was challenged with both T. brucei bruceiĀ  and T. evansi parasites. Group IV was left as uninfected control. Each infected ram received 2 mL of the infected blood containing 2x106 trypomastigotes via the jugular vein. The animals were examined for clinical observations, reaction time for semen collection and abnormalities in the morphology of the spermatozoa.

Results: Infection of rams with trypanosomes showed scrotal edema, scrotal atrophy, loss of libido, increased semen collection reaction time, and significant increase of spermatozoa morphological abnormalities in all the infected rams. The rams especially in groups I and III were all deemed unfit for breeding by the end of the 98 days post infection, while the uninfected rams remained as healthy and had normal values of sperm morphology throughout the study period.

Conclusion: Single or mixed interaction with T. brucei brucei or T. evansi is capable of causing infertility and reproductive failure in Yankasa rams.

http://doi.org/10.5455/javar.2016.c174

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Author Biographies

Yunusa A. Wada, Department of Zoology, Faculty of Life Sciences, Ahmadu Bello University, Zaria

Department of Zoology, Faculty of Life Sciences, Ahmadu Bello University,Zaria

Sonnie J. Oniye, Department of Zoology, Faculty of Life Sciences, Ahmadu Bello University, Zaria
Department of Zoology, Faculty of Life Sciences, Ahmadu Bello University, Zaria
Peter I. Rekwot, National Animal Production Research Institute, Ahmadu Bello University, P.M.B. 1096 Shika-Zaria
National Animal Production Research Institute, Ahmadu Bello University, P.M.B. 1096 Shika-Zaria
Oluyinka O. Okubanjo, Department of Veterinary Parasitology and Entomology, Faculty of Veterinary Medicine, Ahmadu Bello University, Zaria

Department of Veterinary Parasitology and Entomology, Faculty of Veterinary Medicine, Ahmadu Bello University, Zaria

Published
2017-02-13
How to Cite
Wada, Y. A., Oniye, S. J., Rekwot, P. I., & Okubanjo, O. O. (2017). Single and mixed interaction of experimental Trypanosoma brucei brucei and Trypanosoma evansi on the semen collection reaction time and spermatozoa morphology of Yankasa rams. Journal of Advanced Veterinary and Animal Research, 3(4), 360-367. Retrieved from https://www.banglajol.info/index.php/JAVAR/article/view/31517
Section
Original Articles